Submission #1017518

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017518		vjudge1	Klasika (COCI20_klasika)	C++17	0 / 110	5056 ms	8960 KiB

klasika

#include <bits/stdc++.h>
using namespace std;

#define ll long long
int const N=2e5+5;
int const mod=1e9+7;

vector<pair<int,int>> adj[N];
int par1[N];
int n=1;
int ss=0;
int ans=0;
void dfs1(int node,int xr=0,bool vs=0,int p=0){
	if(node==ss)
		vs=1;
	if(vs)
		ans=max(ans,xr);
	for(auto [c,w]:adj[node]){
		if(c!=p)
			dfs1(c,xr^(w),vs,node);
	}
}
void dfs2(int node,int xr=0,int p=0){
	if(node==ss)
		return;
	ans=max(ans,xr);
	for(auto [c,w]:adj[node]){
		if(c!=p)
			dfs2(c,xr^(w),node);
	}
}
int main(){
	int q;
	cin>>q;
	while(q--){
		string s;
		cin>>s;
		if(s=="Add"){
			n++;
			int u,w;
			cin>>u>>w;
			par1[n]=u;
			adj[u].push_back({n,w});
			adj[n].push_back({u,w});
		}
		else{
			int a,b;
			cin>>a>>b;
			int p=par1[a];
			bool bl=0;
			while(p!=0){
				if(p==b)
					bl=1;
				p=par1[p];
			}
			if(bl){
				ss=b;
				dfs2(a);
				cout<<ans<<endl;
				ans=0;
				ss=0;
			}
			else{
				ss=b;
				dfs1(a,0,0);
				cout<<ans<<endl;
				ans=0;
				ss=0;
			}
		}
	}
	return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 22
• Subtask 3: 0 / 33
• Subtask 4: 0 / 44